• SEALED PRESSURIZED INK REFILL • Refill tip is Ultra-hard Tungsten Carbide Ball, Stainless steel precision socket prevents leaking yet delivers uniform ink flow. • Writes underwater, upside down, at any angle,extreme temperatures from – 30º F (-35º C) to +250º F (121º C), over grease, 3 times longer than the average pen, etc. • Compartible with all standard Fisher cartridges. • Bullet Grips have rubber finger grip. • Comes with attractive gift box. • Classic Bullet Pen in Non-Reflective Matte Black with pocket clip. When closed, the Bullet Space Pen is the perfect size to carry in your wallet, pocket, purse, car glove box, organizer or toolbox; they will write upside down - at any angle, under water, through grease, extreme temperatures -30 to +250 degrees F, on almost any surface, three times longer than the average pen, and of course in the gravity free vacuum of space. • When opened it's a full sized, evenly balanced writing instrument. • The Bullet's timeless styling has been the topic of many art books and magazine articles. • Often imitated but never duplicated, the Fisher Bullet Space Pen continues to be the most popular pen.